JP6599832B2 - Machine tool and work plane machining method - Google Patents

Description

  The present invention relates to a machine tool having, for example, a plane machining means and a workpiece plane machining method.

  Recently, when machining a workpiece using a machining center, a milling tool having a diameter larger than one of the XY dimensions, as viewed from the upper surface of the workpiece, is attached to the spindle of the machine tool in one linear pass. By processing, it is possible to perform planar processing with good flatness.

  However, when the workpiece to be machined is large, the diameter of the milling tool has to be increased, and the machine tool to be used has a tendency to increase in size.

  In order to solve this problem, there is a method of performing planar processing with a small diameter milling tool using a small machine tool. However, the area of the upper surface of the workpiece cannot be covered with one pass with only one straight line, and therefore, it is necessary to perform at least two passes. In this case, a minute step is generated between two or more passes on the processing plane unless the spindle attached to the machine tool is attached so as to be completely orthogonal to the feed shaft that drives the XY axes. End up.

  At the manufacturing stage, it is practically impossible to mount the spindle so that it is completely perpendicular to the feed axis that drives the XY axes with zero error, and the spindle has a static accuracy as close to zero as possible. Even if it is mounted, the mounting angle of the main shaft is inclined with respect to the feed shaft that drives the XY axes due to thermal displacement. A step will occur.

  According to Patent Document 1, before starting machining, the spindle is rotated at the rotational speed used in machining, the tool tip position is obtained, the thermal displacement amount of the spindle is obtained, and the ratio of the tip position to the obtained thermal displacement amount is calculated. A method is disclosed in which a certain correction coefficient is obtained, and after machining is started, machining is performed while correcting the control amount of the cutting movement means using the obtained correction coefficient.

JP 2008-264883 A

  However, the method described in Patent Document 1 is not a correction that takes into account the inclination of the main axis, but merely a correction of the Z-axis position with respect to the program command value, and it is difficult to correct the step during the planar machining.

  Here, the factor which a level | step difference generate | occur | produces at the time of plane processing with a small diameter milling tool is demonstrated, referring FIG. 25A-FIG.

  When the milling tool 1004 is held on the spindle 1002 of the machine tool 1000 configured as shown in FIG. 25A and the workpiece 1006 is planarized, as shown in FIGS. 25B and 25C, the short dimension Ls of the workpiece 1006 is obtained. However, if the diameter D of the milling tool 1004 is small, a machining pass having at least two passes or a machining pass in which the contact areas of the milling tool 1004 overlap is required.

  As an ideal machine tool 1000 as shown in FIG. 25A, the main shaft 1002 needs to be attached in a direction that is completely orthogonal to the Y axis that drives the saddle 1008 and the X axis that drives the table 1010. It is very difficult to assemble these static precisions with zero error at the manufacturing stage, and most machine tools have slight errors.

As shown in FIG. 25A, for example, when the main shaft 1002 is inclined about the Y-axis, when the milling in a straight line relative to the workpiece 1006 in the X direction, the step 1012 is generated in the work 1006 as shown in FIG. 26 End up. The example shown in FIG. 26 is merely an example, and even if the milling tool 1004 is larger than the short dimension Ls of the workpiece 1006, two or more machining passes or the contact areas of the milling tool 1004 may overlap. In the case of a simple processing pass, a step is generated as described above.

  As a means for avoiding the occurrence of the step 1012 as shown in FIG. 26, it is necessary to attach the main shaft 1002 with high precision so as to be orthogonal to the Y-axis feeding operation at the manufacturing stage. If a thermal displacement occurs in the column 1014 or the spindle head 1016 of the machine tool 1000 due to the influence, even if the spindle 1002 is assembled with high accuracy, there is a problem that a slight amount of inclination is generated in the feed axis operation after all.

  The present invention has been made in consideration of such a problem. For example, a machine that can suppress the occurrence of a step as much as possible when performing planar machining of a large workpiece using a general-purpose small machine tool. It is an object of the present invention to provide a machine and a work plane machining method.

[1] A machine tool according to a first aspect of the present invention includes a table having a workpiece installation surface to which a workpiece is fixed, a spindle to which a tool for planarizing the workpiece fixed to the table is attached, and the tool. A machine tool having a workpiece plane machining control unit that performs machining so that a projected area of the tool partially overlaps the plane of the workpiece when the workpiece is planarized using, And at least two processes for measuring the position of the contact after positioning at least one contact disposed at a position facing the table and the contact at the same point in at least one phase of the main shaft. A contactor position storage unit for storing a plurality of measurement values obtained by performing the operation, and a surface processing X based on the plurality of measurement values stored in the contactor position storage unit. Based on the inclination angle of the main axis calculated by the main axis inclination angle calculation section, the main axis inclination angle calculation section that calculates the inclination angle of the main axis with respect to the plane, A coordinate rotation unit that rotates around at least one of the axes, and the workpiece plane machining control unit machining the plane of the workpiece on the XY plane rotated by the coordinate rotation unit. It is characterized by.

  Thereby, for example, when a large-sized workpiece is flattened using a general-purpose small machine tool, generation of a step can be suppressed as much as possible.

[2] In the first aspect of the present invention, the contactor position storage unit stores a plurality of measurement values obtained by positioning one contactor at the same point at two or more different phases of the main shaft. May be.

  Thereby, for example, when one contactor is positioned at the same point at two different phases of the main axis, one direction (for example, the Y direction) of the XY plane and the main axis can be in a positional relationship orthogonal to each other. As a result, even when milling is performed a plurality of times in other directions (for example, the X direction), almost no step is generated in the workpiece, and a good flat surface can be formed on the workpiece.

  In addition, when one contactor is positioned at the same point in three different phases of the main shaft, the positional relationship in which one direction (for example, Y direction) and the other direction (X direction) of the XY plane and the main shaft are orthogonal to each other can do. As a result, it is possible to form a good flat surface on the workpiece without causing almost any step in the workpiece.

  The reason for using one contactor is as follows. That is, if a plurality of contacts are set, the process of measuring the position of the contacts may be affected by the attachment error of the plurality of contacts. Therefore, by making the contact to be measured the same, it is possible to accurately set one direction of the XY plane and the main axis to be orthogonal to each other without depending on the attachment error of the contact.

[3] In the first aspect of the present invention, the plurality of contacts are installed on the main shaft, and the contact position storage unit positions the plurality of contacts at the same point with one phase of the main shaft. In the above, a plurality of measurement values obtained by performing a process of measuring each position of the plurality of contacts are stored, and the spindle inclination angle calculation unit is configured to generate the XY plane based on the plurality of measurement values. An inclination angle of the main axis with respect to at least one direction may be obtained.

  Thereby, one direction (for example, Y direction) of the XY plane and the principal axis can be orthogonally crossed, and a good flat surface can be formed on the work without causing almost any step in the work.

In particular, the main shaft is only the position measurement and positioning in the first phase, it is possible to obtain the tilt angle for the one direction of the main shaft. This can shorten the reduction and work time steps to perpendicular and the main axis direction of the XY plane.

[4] In the first aspect of the present invention, the contact is a tip installed at a position facing the table in the tool, and the contact position storage unit is a blade edge position fixed to the table. You may memorize | store the several measured value obtained by implementing the process which measures the position of the said blade edge | tip at least twice, after positioning the blade edge | tip of the said chip | tip using a measurement means.

  By using the tip as a contact, no special dedicated measuring instrument is required. This leads to cost reduction. Moreover, since it is sufficient to use a tool that is actually used for machining a workpiece, it is possible to perform position measurement in consideration of crossing of tools. Normally, when a measuring instrument is used, it is necessary to finely adjust the measured value in consideration of the crossing of the tools, but this is not necessary, and the measurement work can be simplified.

[5] In this case, it is preferable to use a tool length measuring device for measuring the length of the tool as the cutting edge position measuring means. Thereby, the distance between the chip installed on the tool and the touch sensor surface of the tool length measuring device can be measured with high accuracy. The tool length measuring device may be a contact type or a non-contact type.

[6] In the first aspect of the present invention, the contact is a contact probe of a touch probe installed at a position facing the table among the main shafts, and the contact is from the central axis of the main shaft. it is preferable that the table X direction or of being displaced in the Y direction. Thereby, it is not necessary to attach a special measuring device to the table side, and the installation space on the table upper surface can be secured.

[7] In the first aspect of the present invention, the apparatus may further include a rotation axis that rotates the workpiece installation surface so that the XY plane rotated by the coordinate rotation unit and the workpiece installation surface are parallel to each other. .

  Usually, when a workpiece is set on the upper surface of the table, the upper surface of the table is the workpiece setting surface. In this case, the XY plane and the work installation surface of the table are not always parallel and may have a subtle error. Therefore, there is a possibility that the above-described subtle error is reflected on the workpiece after plane machining on the workpiece. That is, the side surface shape of the workpiece may not be processed into a rectangular shape.

  However, in the present invention, since the XY plane rotated by the coordinate rotation unit and the workpiece installation surface are provided so that the workpiece installation surface is parallel, the XY plane and the workpiece installation surface are parallel. When plane processing is performed on the workpiece based on the XY plane after coordinate rotation, the side surface shape of the workpiece can be processed into a rectangular shape, and the processing quality can be improved.

[8] In the first aspect of the present invention, further comprising a natural clamp jig for positioning the workpiece installation surface so that the XY plane rotated by the coordinate rotation unit and the workpiece installation surface are parallel to each other. Also good. As a result, the XY plane and the workpiece installation surface are parallel, and when the workpiece is planarized based on the XY plane after coordinate rotation, the side surface shape of the workpiece can be processed into a rectangular shape. Quality can be improved.

[9] In the first aspect of the present invention, the diameter of the tool may be smaller than the short dimension of the workpiece.

  As a result, when milling is performed a plurality of times, even if the machining paths of the tools overlap, there is almost no step in the workpiece, and a good flat surface can be formed on the workpiece. Of course, the machining path of the tool may be not only linear but also arcuate.

[10] A work plane machining method according to a second aspect of the present invention includes a table having a workpiece installation surface on which a workpiece is fixed, a spindle to which a tool for plane machining the workpiece installed on the table is attached, A workpiece plane machining method for machining a plane so as to partially overlap a projected area of the tool with respect to the plane of the workpiece when the workpiece is planarized using a tool. A plurality of contacts obtained by performing at least two processes of measuring the position of the contactor after positioning at least one contactor installed at a position to be at the same point with at least one phase of the main shaft. A measured value storage step for storing measured values, and a main axis for calculating an inclination angle of the main axis with respect to the XY plane of planar processing based on the stored plural measured values And a coordinate rotation step for rotating the XY plane around at least one of the X axis and the Y axis based on the calculated inclination angle of the main axis. Then, the plane of the workpiece is machined on the XY plane rotated in the coordinate rotation step.

[11] In the second aspect of the present invention, the measurement value storing step stores a plurality of measurement values obtained by positioning one contactor at the same point at two or more different phases of the spindle. May be.

[12] In this case, a plurality of the contacts are installed on the main shaft, and the measurement value storing step includes positioning the plurality of contacts at the same point with one phase of the main shaft, A plurality of measurement values obtained by performing a process of measuring each position of the contact are stored, and the spindle inclination angle calculation step relates to at least one direction of the XY plane based on the plurality of measurement values. The inclination angle of the main axis may be obtained.

[13] In the second aspect of the present invention, the contact is a tip installed at a position facing the table in the tool, and the measurement value storing step is performed by measuring a blade edge position fixed to the table. You may memorize | store the several measured value obtained by implementing the process which measures the position of the said blade edge | tip at least twice, after positioning the blade edge | tip of the said chip | tip using a means.

[14] In the second aspect of the present invention, the contact is a contact probe of a touch probe installed at a position facing the table among the main shafts, and the contact is from the central axis of the main shaft. or X direction of table may be displaced in the Y direction.

[15] In the second aspect of the present invention, the diameter of the tool may be smaller than the short dimension of the workpiece.

  According to the machine tool and the workpiece plane machining method according to the present invention, for example, when performing plane machining of a large workpiece using a general-purpose small machine tool, it is possible to suppress the generation of a step as much as possible.

It is a lineblock diagram showing a machine tool (1st machine tool) concerning a 1st embodiment. 2A is an explanatory view showing an example of a tip of a milling tool positioned on a workpiece installation surface, FIG. 2B is an outline view showing the milling tool as viewed from above, and FIG. 2C shows the workpiece as seen from above. It is the external view which a part was abbreviate | omitted. FIG. 3A is a diagram showing a state where a specific chip is positioned on the touch sensor surface of the tool length measuring device installed on the workpiece installation surface as viewed from the X direction, and FIG. 3B is a diagram showing the state shown in FIG. 3A from the Z direction. FIG. It is a flowchart which shows the processing operation of a 1st machine tool. FIG. 5A is a diagram showing a state in which the main shaft is moved upward from the state of FIG. 3A and then the main shaft is rotated by 180 °, and FIG. 5B is a diagram showing the state shown in FIG. 5A from the Z direction. FIG. 6A is a diagram illustrating a state where a specific chip is positioned on the touch sensor surface of the tool length measuring device from the state of FIG. 5A as viewed from the X direction, and FIG. 6B is a diagram illustrating the state illustrated in FIG. 6A as viewed from the Z direction. These are shown with some parts omitted. It is explanatory drawing which shows the plane processing by a 1st machine tool. It is a block diagram which shows the machine tool (2nd machine tool) which concerns on 2nd Embodiment. It is a flowchart which shows the processing operation of a 2nd machine tool. FIG. 10A is an explanatory diagram showing a state in which the spindle is set to the first phase and the specific chip is positioned on the touch sensor surface of the tool length measuring device, and FIG. 10B is a diagram in which the spindle is set from the first phase to the second phase. FIG. 10C is an explanatory diagram illustrating a state in which the spindle is set to the tool length measuring device with the main shaft being set from the second phase to the third phase. It is explanatory drawing which shows the feature point of the machine tool (3rd machine tool) which concerns on 3rd Embodiment. It is a flowchart which shows the processing operation of a 3rd machine tool. FIG. 13A is a diagram illustrating a state in which the spindle is set to the first phase and the first specific chip is positioned on the touch sensor surface of the tool length measuring device as viewed from the X direction, and FIG. 13B is a diagram illustrating the state illustrated in FIG. It is a figure seen from a direction, and a part is omitted and shown. FIG. 14A is a view showing a state in which the second specific chip is positioned on the touch sensor surface of the tool length measuring device without changing the phase of the spindle, as viewed from the X direction, and FIG. 14B is a view showing the state shown in FIG. It is a figure seen from a direction, and a part is omitted and shown. It is a block diagram which shows the machine tool (4th machine tool) which concerns on 4th Embodiment. It is a flowchart which shows the processing operation of a 4th machine tool. It is a block diagram which shows the machine tool (5th machine tool) which concerns on 5th Embodiment. 18A is a diagram showing a state in which the probe of the touch probe is positioned at a specific position on the workpiece installation surface as viewed from the X direction, and FIG. 18B is a diagram showing the state shown in FIG. 18A as viewed from the Z direction. The part is omitted. It is a flowchart which shows the processing operation of a 5th machine tool. FIG. 20A is a diagram showing a state in which the main shaft is moved upward from the state of FIG. 18A and then the main shaft is rotated by 180 °, and FIG. 20B is a diagram showing the state shown in FIG. 20A from the Z direction. It is a top view to show, a part is abbreviate | omitted and shown. FIG. 21A is a diagram showing a state where the probe of the touch probe is positioned at a specific position on the work installation surface from the state of FIG. 20A as viewed from the X direction, and FIG. 21B is a diagram of the state shown in FIG. It is a figure and a part is omitted and shown. It is a figure which shows the modification of a touch probe seeing from a X direction. It is a block diagram which shows the machine tool (6th machine tool) which concerns on 6th Embodiment. It is a block diagram which shows the machine tool (7th machine tool) which concerns on 7th Embodiment. FIG. 25A is a schematic configuration diagram showing a machine tool according to a conventional example, FIG. 25B is an external view showing the milling tool as viewed from above, and FIG. 25C is an external view with a part omitted when the work is seen from above. It is. It is explanatory drawing which shows the conventional problem (a level | step difference is formed in the surface of a workpiece | work).

  Embodiments of a machine tool and a work plane machining method according to the present invention will be described below with reference to FIGS. In addition, in this specification, "-" which shows a numerical range is used as the meaning containing the numerical value described before and behind that as a lower limit and an upper limit.

<First machine tool>
First, the machine tool according to the first embodiment (hereinafter referred to as the first machine tool 10A) is freely movable via a bed 12 as a base and a saddle 14 on the bed 12, as shown in FIG. Of the table 20, the table 20 having the workpiece installation surface 18 to which the workpiece 16 is fixed, the column 24 fixed on the bed 12 and supporting the spindle head 22 so as to be movable up and down, and the spindle head 22. A main shaft 26 installed at a position opposite to the work installation surface 18, a milling tool 28 attached to the main shaft 26 to planarize the workpiece 16, and a workpiece 16 when planarizing the workpiece 16 using the milling tool 28. And a workpiece plane machining control unit 30 that performs machining so that the projected areas of the milling tool 28 partially overlap each other.

The table 20 moves on the saddle 14 in the X direction by one feed shaft (X axis) (not shown), and the saddle 14 moves on the bed 12 in the Y direction by the other feed shaft (Y axis) (not shown). To do. The movement of the table 20 and the saddle 14 is performed automatically or manually by the work plane machining control unit 30. That is, the table 20 moves in the X direction and the Y direction along the XY plane 31 established by the X axis and the Y axis that drive the table 20.

  The milling tool 28 is installed in the main shaft 26 at a position facing the workpiece installation surface 18 of the table 20, and has a plurality of chips 32 protruding toward the workpiece installation surface 18 as shown in FIG. 2A. In FIG. 2A, two chips 32 that are typically disposed facing each other at 180 ° are shown, but actually, three or more chips 32 are disposed along the circumference of the milling tool 28 at, for example, equal intervals. . Further, as shown in FIGS. 2B and 2C, the diameter D of the milling tool 28 is smaller than the short dimension Ls of the workpiece 16.

  Further, as shown in FIG. 1, the first machine tool 10 </ b> A includes a cutting edge position measurement unit 34, a cutting edge position storage unit 38 as a contactor position storage unit 36, a spindle inclination angle calculation unit 40, and a coordinate rotation unit 42. And having.

  The blade edge position measuring unit 34 includes a main shaft displacement measuring unit 44 that measures the displacement of the main shaft 26, and a tool length measuring device 46 that is placed and fixed on the workpiece installation surface 18.

  As shown in FIGS. 3A and 3B, the tool length measuring device 46 is installed on the workpiece installation surface 18 of the table 20 with the touch sensor surface 46 a facing upward. As will be described later, when the spindle 26 is moved toward the tool length measuring device 46 and the cutting edge of a specific tip 32 (hereinafter referred to as a specific tip 32a) as a contact comes into contact with the touch sensor surface 46a, that is, When the cutting edge of the specific tip 32 a is positioned on the tool length measuring device 46, the tool length measuring device 46 outputs a detection signal Sa to the spindle displacement measuring unit 44.

  The spindle displacement measuring unit 44 measures the amount of movement of the specific tip 32a from the time when the movement of the specific tip 32a is started, and based on the input of the detection signal Sa from the tool length measuring device 46, the amount of movement of the specific tip 32a. Is stored in the blade edge position storage unit 38.

  That is, in the blade edge position storage unit 38, a plurality of measurement values (first measurement value M1 and second measurement value) obtained by performing the process of positioning the blade edge of the specific chip 32a twice using the blade edge position measurement unit 34. The measured value M2) is stored. When the cutting edge of the specific chip 32a is positioned on the tool length measuring device 46, the operator operates the execution button installed on the control panel of the first machine tool 10A, thereby including the amount of movement of the specific chip 32a. The value may be stored in the blade edge position storage unit 38.

  The main shaft inclination angle calculation unit 40 obtains the inclination angle of the main shaft 26 with respect to the XY plane 31, in particular, the inclination angle αy related to the Y direction, based on a plurality of measurement values stored in the cutting edge position storage unit 38.

The coordinate rotation unit 42 rotates the XY plane 31 around the X axis by the inclination angle αy of the main axis 26 calculated by the main axis inclination angle calculation unit 40. Specifically, the coordinate rotating unit 42 simultaneously drives the Z axis during the Y axis driving so that the Y axis is driven in the direction that cancels the calculated inclination angle αy on the XY plane 31. Thereby, the Y direction of the XY plane 31 and the main axis 26 are orthogonal to each other.

  Here, the processing operation of the first machine tool 10A will be described with reference to FIGS. 3A to 7 as well. It is assumed that the main shaft 26 is located at the machine origin in the initial state.

  First, in step S1 of FIG. 4, as shown in FIG. 3A described above, the tool length measuring device 46 is placed on the work installation surface 18 of the table 20 with the touch sensor surface 46a facing upward.

  In step S2, as shown in FIG. 3B, among the plurality of chips provided at the tip of the milling tool 28, the first axis of the main shaft 26 is set so that one chip (hereinafter referred to as a specific chip 32a) is oriented in the Y direction. One phase is defined.

  In step S3, as shown in FIG. 3B, the table 20 and the saddle 14 are moved so that the central portion of the touch sensor surface 46a of the tool length measuring device 46 is located below the specific chip 32a.

  In step S4, as shown in FIG. 3A, the spindle 26 is moved downward to position the specific chip 32a at the center of the touch sensor surface 46a of the tool length measuring device 46.

  In step S5, the spindle displacement measuring unit 44 stores the displacement of the specific tip 32a, that is, the movement amount of the specific tip 32a in the blade position storage unit 38 as the first measured value M1. At this time, the cutting edge position storage unit 38 may store three-dimensional coordinates (X1, Y1, Z1). In this case, since the X coordinate and the Y coordinate are not displaced when the installation position of the tool length measuring device 46 is set as the origin, X1 = 0 and Y1 = 0, and Z1 is the Z direction of the specific chip 32a. This corresponds to the amount of movement.

  In step S6, the main shaft 26 is moved upward to return to the mechanical origin.

  In step S7, as shown in FIGS. 5A and 5B, the main shaft 26 is rotated 180 ° from the first phase.

  In step S8, the specific chip 32a can be measured again by the tool length measuring device 46, that is, as shown in FIGS. 6A and 6B, the touch sensor surface 46a of the tool length measuring device 46 is located below the specific chip 32a. The table 20 and the saddle 14 are moved in the Y direction so that the central portion is located.

  In step S <b> 9, the main shaft 26 is moved downward to position the specific chip 32 a at the center portion of the touch sensor surface 46 a of the tool length measuring device 46.

  In step S10, the spindle displacement measuring unit 44 stores the displacement of the specific tip 32a, that is, the movement amount of the specific tip 32a in the blade position storage unit 38 as the second measured value M2. At this time, the cutting edge position storage unit 38 may store three-dimensional coordinates (X2, Y2, Z2). In this case, when the installation position of the tool length measuring device 46 is the origin, the X coordinate is not displaced, so X2 = 0. Y2 corresponds to the amount of movement displacement of the XY plane 31 in the Y direction, and Z2 corresponds to the amount of movement displacement of the main shaft 26 in the Z direction.

  In step S <b> 11, the main spindle inclination angle calculation unit 40 calculates the inclination angle of the main spindle 26 with respect to the XY plane 31 based on the first measurement value M <b> 1 and the second measurement value M <b> 2 stored in the blade edge position storage unit 38. In the above example, since the X coordinate is the same, the inclination angle αy of the main axis 26 with respect to the Y axis is obtained using a trigonometric function from the Y coordinate and the Z coordinate of the first measured value M1 and the second measured value M2. Ask for.

In step S12, the coordinate rotation unit 42 rotates the XY plane 31 around the X axis by the inclination angle αy of the main axis 26 calculated by the main axis inclination angle calculation unit 40. Specifically, the coordinate rotation unit 42 simultaneously drives the Z axis when driving the Y axis so that the Y axis is driven in a direction to cancel the calculated inclination angle αy. Thereby, the Y direction of the XY plane 31 and the main axis 26 are orthogonal to each other. The coordinate information Dxy of the XY plane 31 is registered in the XY plane table TB.

  In step S <b> 13, the work plane processing control unit 30 reads the coordinate information Dxy of the XY plane 31 from the XY plane table TB, and the coordinates are rotated by the coordinate rotation unit 42 with respect to the workpiece 16 fixed to the workpiece installation surface 18. Then, planar processing is performed along the XY plane 31 after. The same applies hereinafter.

  Since the diameter D of the milling tool 28 is smaller than the short dimension Ls of the workpiece 16, when performing planar processing on the workpiece, it is necessary to perform milling multiple times. However, since the Y direction of the XY plane 31 and the main axis 26 are orthogonal to each other, milling is performed a plurality of times in the X axis direction, and even if the machining paths of the milling tool 28 overlap, As shown in FIG. 7, there is almost no step in the work 16, and a good flat surface can be formed on the work 16. That is, the flatness of the processed surface of the workpiece 16 can be improved. This is the same even if the machining path of the milling tool 28 is not only linear but also arcuate.

  In the first machine tool 10A, the phase of the main shaft 26 is rotated by 180 ° for the following reason. That is, if a plurality of specific chips 32a are set, there may be a case where they cannot be opposed to each other by 180 ° due to an attachment error of the plurality of specific chips 32a. Therefore, by making the specific chips 32a to be measured the same, the positional relationship in which the Y direction of the XY plane 31 and the main shaft 26 are orthogonally crossed accurately without depending on the mounting error of the plurality of specific chips 32a. Is possible. In the above example, the contact-type tool length measuring device 46 is used. However, if there is no interference, a non-contact-type tool length measuring device, a sensor, or the like may be used. The same applies to various embodiments described later.

<Second machine tool>
Next, a machine tool according to a second embodiment (hereinafter referred to as a second machine tool 10B) will be described with reference to FIGS. 8 to 10C.

  The second machine tool 10B has substantially the same configuration as the first machine tool 10A described above, but the X direction of the XY plane 31 and the main axis 26 are orthogonal to each other, and the Y direction of the XY plane 31 and the main axis 26 are It differs in that it is orthogonal.

  That is, as shown in FIG. 8, the second machine tool 10 </ b> B has a plurality of measured values (first values) obtained by positioning the specific tip 32 a on the same tool length measuring device 46 at three different phases of the main shaft 26. 1 measurement value M1 to 3rd measurement value) are stored in the blade edge position storage unit 38. Then, the spindle inclination angle calculation unit 40 is based on a plurality of measurement values stored in the blade position storage unit 38, and the inclination angle of the spindle 26 with respect to the XY plane 31, in particular, the inclination angle αy related to the Y direction and the inclination related to the X direction. Find the angle αx.

  The coordinate rotating unit 42 simultaneously drives the Z-axis when driving the Y-axis and the X-axis so that the respective axes are driven on the XY plane 31 in a direction that cancels the calculated inclination angle αy and inclination angle αx. Thereby, the Y direction and X direction of the XY plane 31 and the main axis 26 are orthogonal to each other.

  Here, the processing operation of the second machine tool 10B will be described with reference to FIGS. 9 to 10C. In addition, about the step which performs the process similar to 10A of 1st machine tools, the duplication description is abbreviate | omitted.

  First, in steps S101 to S105 in FIG. 9, as shown in FIG. 10A, the same processing as the processing in the first machine tool 10A (steps S1 to S5) described above is performed, and the movement amount of the specific chip 32a is set to the first amount. The measured value M1 is stored in the cutting edge position storage unit 38. When the three-dimensional coordinates (X1, Y1, Z1) are stored in the cutting edge position storage unit 38, X1 = 0 and Y1 = 0, and Z1 corresponds to the amount of movement of the specific chip 32a in the Z direction. In this case, the movement amount of the main shaft 26 in the first phase is stored in the cutting edge position storage unit 38 as the first measurement value M1. The first phase may be, for example, 0 ° or a different phase (for example, 37 °).

  Thereafter, in step S106, the main shaft 26 is moved upward to return to the mechanical origin, for example.

  In step S107, the main shaft 26 is rotated from the first phase to another phase (second phase). Examples of the second phase include 241 °.

  In step S108, as shown in FIG. 10B, the specific tip 32a can be measured by the tool length measuring device 46, that is, the center portion of the touch sensor surface 46a of the tool length measuring device 46 is positioned below the specific tip 32a. Thus, the table 20 and the saddle 14 are moved.

  In step S109, the spindle 26 is moved downward to position the specific chip 32a at the center of the touch sensor surface 46a of the tool length measuring device 46.

  In step S110, the spindle displacement measuring unit 44 stores the displacement of the specific tip 32a, that is, the movement amount of the specific tip 32a in the blade position storage unit 38 as the second measured value M2. At this time, the cutting edge position storage unit 38 may store three-dimensional coordinates (X2, Y2, Z2). In this case, X2 corresponds to the amount of movement displacement in the X direction of the XY plane 31, Y2 corresponds to the amount of movement displacement in the Y direction of the XY plane, and Z2 corresponds to the Z direction of the main shaft 26. This corresponds to the amount of movement displacement.

  In step S111, the main shaft 26 is moved upward to return to the mechanical origin.

  In step S112, the main shaft 26 is rotated from the second phase to another phase (third phase). Examples of the third phase include 309 °.

  In step S113, as shown in FIG. 10C, the specific tip 32a can be measured by the tool length measuring device 46, that is, the center portion of the touch sensor surface 46a of the tool length measuring device 46 is positioned below the specific tip 32a. Thus, the table 20 and the saddle 14 are moved.

  In step S114, the spindle 26 is moved downward to position the specific chip 32a at the center of the touch sensor surface 46a of the tool length measuring device 46.

  In step S115, the blade edge position measurement unit 34 stores the displacement of the specific chip 32a, that is, the movement amount of the specific chip 32a in the blade edge position storage unit 38 as the third measurement value M3. At this time, the cutting edge position storage unit 38 may store three-dimensional coordinates (X3, Y3, Z3). In this case, when the installation position of the tool length measuring device 46 is set as the origin, the movement displacement amount in the X direction of the XY plane 31 corresponds to X3, and the movement displacement in the Y direction of the XY plane 31 corresponds to Y3. The amount corresponds to Z3, and the amount of displacement of the main shaft 26 in the Z direction corresponds to Z3.

  In step S <b> 116, the spindle inclination angle calculation unit 40 obtains the inclination angle of the spindle 26 with respect to the XY plane 31 based on a plurality of measurement values stored in the blade edge position storage unit 38. Using the trigonometric function from the stored X, Y, and Z coordinates of the first measurement value M1, the second measurement value M2, and the third measurement value M3, the inclination angle αx and the Y direction of the main shaft 26 with respect to the X direction Is obtained.

In step S117, the coordinate rotation unit 42 rotates the XY plane 31 about the Y axis by the inclination angle αx of the main axis 26 calculated by the main axis inclination angle calculation unit 40, and about the X axis by the inclination angle αy of the main axis 26. Rotate.

  Specifically, the coordinate rotation unit 42 also moves the Z-axis when driving the Y-axis and the X-axis so that each axis drives the XY plane 31 in a direction that cancels the calculated inclination angle αy and inclination angle αx. Drive simultaneously. Thereby, the Y direction and X direction of the XY plane 31 and the main axis 26 are orthogonal to each other.

  In step S <b> 118, the workpiece plane machining control unit 30 performs plane machining on the workpiece 16 fixed to the workpiece installation surface 18 after the XY plane 31 is coordinate-rotated by the coordinate rotation unit 42.

  At this time, since the Y direction of the XY plane 31 and the main axis 26 are orthogonal to each other, even if milling is performed a plurality of times in the X direction, there is almost no step in the workpiece 16 as shown in FIG. It does not occur, and a good flat surface can be formed on the workpiece 16. That is, the flatness of the processed surface of the workpiece 16 can be improved.

  In the second machine tool 10B, the X direction of the XY plane 31 and the main axis 26 are orthogonal to each other, and the Y direction of the XY plane 31 and the main axis 26 are orthogonal to each other. Processing accuracy can be improved. In particular, depending on the tolerance of the processed product, even if the side surface shape is somewhat trapezoidal, the flatness of the processed surface may be prioritized, which is an extremely effective means.

<Third machine tool>
Next, a machine tool according to a third embodiment (hereinafter referred to as a third machine tool 10C) will be described with reference to FIGS. 11 to 14B. Overall configuration of the third machine tool is substantially the same as the first machine tool 10A shown in FIG.

  Although the third machine tool 10C has substantially the same configuration as the first machine tool 10A described above, as shown in FIG. 11, the spindle 26 has two specific chips (a first specific chip 32a and a second specific chip 32b). Are different in that they are attached to face each other at 180 °.

  Here, the processing operation of the third machine tool 10C will be described with reference to FIGS. In addition, about the step which performs the process similar to 10A of 1st machine tools, the duplication description is abbreviate | omitted.

  First, in steps S201 to S205 in FIG. 12, as shown in FIGS. 13A and 13B, the same processing as the processing in the first machine tool 10A described above (steps S1 to S5) is performed, and the first specific chip 32a is processed. The movement amount is stored in the cutting edge position storage unit 38 as the first measurement value M1 (X1, Y1, Z1). In this case, X1 = 0 and Y1 = 0, and Z1 corresponds to the amount of movement of the first specific chip 32a in the Z direction.

  In step S206, the main shaft 26 is moved upward to return to the machine origin, for example.

  In step S207, the second specific tip 32b can be measured by the tool length measuring device 46 without changing the phase of the main spindle 26, that is, as shown in FIGS. 14A and 14B. The table 20 and the saddle 14 are moved so that the central portion of the touch sensor surface 46a of the tool length measuring device 46 is positioned below 32b.

  Thereafter, in step S208, the main shaft 26 is moved downward to position the second specific chip 32b at the central portion of the touch sensor surface 46a of the tool length measuring device 46.

  In step S209, the blade edge position measurement unit 34 stores the displacement of the second specific chip 32b, that is, the amount of movement of the second specific chip 32b in the blade edge position storage unit 38 as the second measurement value M2 (X2, Y2, Z2). . At this time, since the X coordinate is not displaced, X2 = 0. Y2 corresponds to the amount of movement displacement of the XY plane 31 in the Y direction, and Z2 corresponds to the amount of movement displacement of the main shaft 26.

  In step S <b> 210, the main spindle inclination angle calculation unit 40 obtains the inclination angle of the main spindle 26 with respect to the XY plane 31 based on the first measurement value M <b> 1 and the second measurement value M <b> 2 stored in the cutting edge position storage unit 38. As in the case of the first machine tool 10A, the inclination angle αy of the main shaft 26 with respect to the Y axis is calculated using a trigonometric function from the stored Y and Z coordinates of the first measurement value M1 and the second measurement value M2. Ask.

In step S211, the coordinate rotation unit 42 rotates the XY plane 31 around the X axis by the inclination angle αy of the main axis 26 calculated by the main axis inclination angle calculation unit 40.

  In step S212, the workpiece plane machining control unit 30 performs plane machining on the workpiece 16 fixed to the workpiece setting surface 18 after the coordinate rotation unit 42 rotates the XY plane 31.

  At this time, since the Y direction of the XY plane 31 and the main axis 26 are orthogonal to each other, even if milling is performed a plurality of times in the X axis direction, there is a step in the workpiece 16 as shown in FIG. Almost no occurrence occurs, and a good flat surface can be formed on the workpiece 16. That is, the flatness of the processed surface of the workpiece 16 can be improved.

  The third machine tool 10C can be preferably implemented as long as the first specific chip 32a and the second specific chip 32b are opposed to each other by 180 ° and the mounting error does not affect the machining accuracy. According to the third machine tool 10C, the inclination angle αy of the main shaft 26 can be obtained only by positioning and measuring the main shaft 26 in the first phase, and the process of making the Y direction of the XY plane and the main shaft 26 orthogonal to each other. It is possible to reduce the number of man-hours and the work time.

<4th machine tool>
Next, a machine tool according to a fourth embodiment (hereinafter referred to as a fourth machine tool 10D) will be described with reference to FIGS. 15 and 16.

  The fourth machine tool 10D has substantially the same configuration as the third machine tool 10C described above, but the X direction of the XY plane 31 and the main axis 26 are orthogonal to each other, and the Y direction of the XY plane 31 and the main axis 26 are It differs in that it is orthogonal.

  That is, as shown in FIG. 15, the fourth machine tool 10 </ b> D places the first specific tip 32 a and the second specific tip 32 b (see FIG. 11) on the same tool length measuring device 46 at two different phases of the main shaft 26. A plurality of measurement values (first measurement value M <b> 1 to fourth measurement value) obtained by positioning to the blade edge position storage unit 38 are stored.

  The spindle inclination angle calculation unit 40 is based on a plurality of measurement values stored in the cutting edge position storage unit 38, and the inclination angle of the spindle 26 with respect to the XY plane 31, in particular, the inclination angle αy related to the Y direction and the inclination angle related to the X direction. αx is obtained.

  Similar to the second machine tool 10B, the coordinate rotating unit 42 drives the Y axis and the X axis so that each axis drives the XY plane 31 in a direction that cancels the calculated inclination angle αy and inclination angle αx. The Z axis is also driven simultaneously. Thereby, the Y direction and X direction of the XY plane 31 and the main axis 26 are orthogonal to each other.

  Here, the processing operation of the fourth machine tool 10D will be described with reference to FIG. In addition, about the step which performs the process similar to 10C of 3rd machine tools, the duplication description is abbreviate | omitted.

  First, in steps S301 to S309 in FIG. 16, the same processing as that in the third machine tool 10C described above (steps S201 to S209) is performed, and the movement amount of the first specific chip 32a is set to the first measured value M1 (X1). , Y1, Z1) are stored in the cutting edge position storage unit 38, and the movement amount of the second specific tip 32b is stored in the cutting edge position storage unit 38 as a second measured value M2 (X2, Y2, Z2).

  Thereafter, in step S310, the main shaft 26 is moved upward to return to the mechanical origin, for example.

  In step S311, the main shaft 26 is rotated from the first phase to another phase (second phase).

  In step S312, the first specific chip 32a can be measured again by the tool length measuring device 46, that is, the center portion of the touch sensor surface 46a of the tool length measuring device 46 is positioned below the first specific chip 32a. Next, the table 20 and the saddle 14 are moved.

  In step S313, the main shaft 26 is moved downward to position the first specific chip 32a at the center of the touch sensor surface 46a of the tool length measuring device 46.

  In step S314, the blade edge position measurement unit 34 stores the displacement of the first specific chip 32a, that is, the movement amount of the first specific chip 32a in the blade edge position storage unit 38 as the third measurement value M3 (X3, Y3, Z3). To do.

  In step S315, the main shaft 26 is moved upward to return to the machine origin, for example.

  In step S316, the tool length measuring device 46 can now measure the second specific tip 32b while keeping the phase of the main shaft 26 at the second phase, that is, the tool length is measured below the second specific tip 32b. The table 20 and the saddle 14 are moved so that the center portion of the touch sensor surface 46a of the device 46 is located.

  In step S317, the main shaft 26 is moved downward to position the second specific chip 32b at the center of the touch sensor surface 46a of the tool length measuring device 46.

In step S 3 18, displacement of the edge position measuring unit 34 second specific chip 32b, i.e., the amount of movement of the second specific chip 32b to the fourth measurement M4 (X4, Y4, Z4) edge position storage section 38 as Remember.

  In step S319, the spindle inclination angle calculation unit 40 obtains the inclination angles αx and αy of the spindle 26 with respect to the XY plane 31 based on the first measurement value M1 to the fourth measurement value M4 stored in the cutting edge position storage unit 38. .

  In step S320, the coordinate rotation unit 42 simultaneously drives the Z axis while driving the Y axis and the X axis so that the respective axes are driven on the XY plane 31 in a direction that cancels the calculated inclination angle αy and inclination angle αx. To drive. Thereby, the Y direction and X direction of the XY plane 31 and the main axis 26 are orthogonal to each other.

Then, in step S321, the work surface machining control unit 30, X Y plane 31 to implement flattening the workpiece 16 fixed on the workpiece mounting surface 18 after being coordinate rotation by the coordinate rotating portion 42 .

  In the fourth machine tool, the X and Y directions of the XY plane 31 and the main shaft 26 are in a positional relationship that they are orthogonal to each other. A flat surface can be formed. Moreover, the machining accuracy can be further improved as compared with the third machine tool 10C. Depending on the tolerance of the processed product, even if the side surface shape is somewhat trapezoidal, flatness may be given priority. It becomes a very effective means.

  The fourth machine tool 10D can be preferably implemented as long as the first specific chip 32a and the second specific chip 32b are opposed to each other by 180 ° and the mounting error does not affect the machining accuracy. According to the fourth machine tool 10D, the inclination angles αx and αy of the main shaft 26 can be obtained only by positioning and measuring the main shaft 26 in the first phase and positioning and measuring the main shaft 26 in the second phase. Further, it is possible to reduce the man-hours and shorten the work time so that the X direction of the XY plane 31 and the main axis 26 are orthogonal to each other and the Y direction of the XY plane 31 and the main axis 26 are orthogonal to each other.

<Fifth machine tool>
Next, a machine tool according to a fifth embodiment (hereinafter referred to as a fifth machine tool 10E) will be described with reference to FIGS. 17 to 21B.

  As shown in FIG. 17, the fifth machine tool 10 </ b> E has substantially the same configuration as the first machine tool 10 </ b> A described above, but a probe position measuring unit using the touch probe 100 instead of the tool length measuring device 46. 101, instead of the cutting edge position storage unit 38, a measuring element position storage unit 102 as a contactor position storage unit 36 that performs the same processing operation as the cutting edge position storage unit 38 is different.

  As shown in FIG. 18A, the touch probe 100 includes a sensor unit 104 attached to a portion of the main shaft 26 corresponding to the workpiece installation surface 18, and extends downward from the lower part of the sensor unit 104, and bends or curves in the middle. , And a shank 108 to which a spherical measuring element 106 as a contact is fixed. The shank 108 includes a first shank portion 108a that extends downward from the lower portion of the sensor portion 104, a second shank portion 108b that extends laterally from the lower portion of the first shank portion 108a, and a lower portion from the tip of the second shank portion 108b. And a third shank portion 108c extending. The probe 106 is fixed to the tip of the third shank portion 108c.

  Then, as will be described later, when the spindle 26 is moved toward the workpiece installation surface 18 and the probe 106 contacts the workpiece installation surface 18, that is, when the probe 106 of the touch probe 100 is positioned, the sensor unit 104 outputs the detection signal Sa to the spindle displacement measuring unit 44.

  The main shaft displacement measuring unit 44 measures the amount of movement of the main shaft 26 from when the downward movement of the main shaft 26 is started, and based on the input of the detection signal Sa from the sensor unit 104 of the touch probe 100, the measuring element 106 The measured value including the amount of movement is stored in the probe position storage unit 102.

  That is, in the probe position storage unit 102, a plurality of measurement values (first measurement value M <b> 1 and second measurement value M <b> 2) obtained by performing the process of positioning the probe 106 using the touch probe 100 twice. ) Is memorized.

  Here, the processing operation of the fifth machine tool 10E will be described with reference to FIGS. It is assumed that the main shaft 26 is located at the machine origin in the initial state.

  First, in step S401 of FIG. 19, as shown in FIGS. 18A and 18B, the first phase of the main shaft 26 is determined so that the probe 106 of the touch probe 100 provided at the lower end of the main shaft 26 is oriented in the Y direction. .

  In step S402, the spindle 26 is moved downward, and the probe 106 of the touch probe 100 is brought into contact with a specific position (a position indicated by x in FIG. 18B or the like) on the workpiece installation surface 18 to position the probe 106.

  In step S403, the main shaft displacement measuring unit 44 stores the displacement of the main shaft 26, that is, the movement amount of the measuring member 106 in the measuring member position storage unit 102 as the first measured value M1 (X1, Y1, Z1). Since the X coordinate and the Y coordinate are not displaced, X1 = 0 and Y1 = 0, and Z1 corresponds to the amount of movement of the probe 106 in the Z direction.

  In step S404, the main shaft 26 is moved upward to return to the machine origin.

  In step S405, as shown in FIGS. 20A and 20B, the main shaft 26 is rotated 180 ° from the first phase.

  In step S <b> 406, the table 20 and the saddle 14 are moved again so that the measuring element 106 can be positioned at the above-described specific position of the workpiece installation surface 18.

  In step S407, as shown in FIGS. 21A and 21B, the spindle 26 is moved downward to position the probe 106 of the touch probe 100.

  In step S408, the main shaft displacement measuring unit 44 stores the displacement of the main shaft 26, that is, the movement amount of the measuring member 106 in the measuring member position storage unit 102 as the second measured value M2 (X2, Y2, Z2). Since the X coordinate is not displaced, X2 = 0. Y2 corresponds to the amount of movement displacement of the XY plane 31 in the Y direction, and Z2 corresponds to the amount of movement displacement of the main shaft 26.

  In step S409, the spindle inclination angle calculation unit 40 calculates the inclination angle αy of the spindle 26 with respect to the XY plane 31 based on the first measurement value M1 and the second measurement value M2 stored in the stylus position storage unit 102. In the above example, since the X-axis coordinates are the same, the inclination angle αy of the main axis 26 is calculated using a trigonometric function from the stored Y-axis coordinates and Z-axis coordinates of the first measurement value M1 and the second measurement value M2. Ask.

In step S410, the coordinate rotation unit 42 rotates the XY plane 31 around the X axis by the inclination angle αy of the main axis 26 calculated by the main axis inclination angle calculation unit 40. Specifically, the coordinate rotation unit 42 simultaneously drives the Z axis when driving the Y axis so that the Y axis is driven in a direction to cancel the calculated inclination angle αy. Thereby, the Y direction of the XY plane 31 and the main axis 26 are orthogonal to each other.

  In step S <b> 411, the workpiece plane machining control unit 30 performs plane machining on the workpiece 16 fixed to the workpiece installation surface 18 along the XY plane 31 after the coordinates are rotated by the coordinate rotation unit 42.

  At this time, like the first machine tool 10A, even if milling is performed a plurality of times in the X direction, almost no step is generated in the workpiece 16, and a good flat surface can be formed on the workpiece 16. In particular, in the fifth machine tool 10E, since the touch probe 100 installed on the main shaft 26 is used, it is not necessary to attach a special measuring instrument to the table 20, and it is possible to secure an installation space on the upper surface of the table 20. it can.

  In the fifth machine tool 10E, the phase of the main shaft 26 is rotated by 180 ° for the following reason. That is, if a plurality of measuring elements 106 are set, there may be a case where they cannot be opposed to 180 ° due to an attachment error of the plurality of measuring elements 106. Therefore, by making the measuring elements 106 to be measured the same, the relationship between the Y direction of the XY plane 31 and the main axis 26 can be accurately made orthogonal regardless of the mounting error of the plurality of measuring elements 106. It becomes possible.

  Of course, similarly to the second machine tool 10B described above, a plurality of measured values (first measured value M1 to third measured value) obtained by positioning the probe 106 at a specific position with three different phases of the main shaft 26, respectively. Based on the value M3), the inclination angle αy related to the Y direction of the main shaft 26 relative to the XY plane 31 and the inclination angle αx related to the X direction may be obtained. Then, the coordinate rotation unit 42 simultaneously drives the Z-axis when driving the Y-axis and the X-axis so that the respective axes are driven on the XY plane 31 in a direction to cancel the calculated inclination angle αy and inclination angle αx. Thus, the Y-direction and X-direction of the XY plane 31 and the main axis 26 can be in a perpendicular positional relationship.

  Similarly to the first specific chip 32a and the second specific chip 32b used in the third machine tool 10C, as shown in FIG. 22, two measuring elements (first measuring element 106a and first measuring element 106a and The touch probe 100 having the second probe 106b) may be used.

  In this case, the first measuring element 106a and the second measuring element 106b are opposed to each other by 180 °, and the mounting error is preferably at a level that does not affect the machining accuracy. In addition, the inclination angle αy of the main shaft 26 can be obtained only by positioning and measuring the main shaft 26 in the first phase, and the number of processes and the work time for the process of making the Y direction of the XY plane 31 orthogonal to the main shaft 26 can be reduced. Can be shortened.

<Sixth machine tool>
Next, a machine tool according to a sixth embodiment (hereinafter referred to as a sixth machine tool 10F) will be described with reference to FIG.

The second machine tool 10B described above, in the fourth machine tool 10D and the like, X Y based on the inclination angle of the main shaft 26 with respect to the plane 31, so as to X Y plane 31 and the main shaft 26 and the corrected orthogonal relationship (coordinate rotation) I have to.

By the way, when the workpiece 16 is installed on the upper surface of the table 20, the upper surface of the table 20 becomes the workpiece installation surface 18. In this case , since the XY plane 31 and the workpiece installation surface 18 of the table 20 are not always parallel, the side surface shape of the workpiece 16 may not be processed into a rectangular shape.

Therefore, the sixth machine tool 10F has means for making the XY plane 31 and the workpiece installation surface 18 parallel to each other. That is, instead of setting the workpiece installation surface 18 on the upper surface of the table 20, a workpiece installation surface 18 that is parallel to the XY plane 31 is newly set. In addition , the 2nd machine tool 10B mentioned above, the 4th machine tool 10D, etc. can be employ | adopted as a means to make the XY plane 31 and the main axis | shaft 26 the orthogonal relationship.

  The sixth machine tool 10F has a two-axis table 112 on the upper surface of the table 20, the posture of which can be freely changed by two rotation shafts (first rotation shaft 110a and second rotation shaft 110b). .

2-axis table 112 includes a support portion 114 which supports toward the workpiece 16 to the main shaft 26, a second rotary shaft 110 b for rotating the support 114 about a horizontal axis, the support portion 114 and the rotation shaft 110 b and a first rotation shaft 110 a for rotating the door about a vertical axis. In this case, the upper surface of the support portion 114 becomes a new workpiece installation surface 18.

  Then, using the inclination angle αy of the main shaft 26 in the Y direction and the inclination angle αx in the X direction, the first rotation shaft 110a and the second rotation shaft 110b are moved so that the biaxial table 112 and the main shaft 26 are orthogonal to each other. Rotate. As a result, the workpiece installation surface 18 of the two-axis table 112 and the main shaft 26 are in an orthogonal state.

  As a result, the XY plane 31 and the workpiece installation surface 18 are parallel, and when the workpiece 16 is planarized based on the XY plane 31 after coordinate rotation, the flatness of the machining surface of the workpiece 16 is improved. can do. And since the side surface shape of the workpiece | work 16 can be processed into a rectangular shape, the processing surface of the workpiece | work 16 and the workpiece | work installation surface 18 become parallel, and processing quality can be improved.

<Seventh machine tool>
Next, a machine tool according to a seventh embodiment (hereinafter referred to as a seventh machine tool 10G) will be described with reference to FIG.

The seventh machine tool 10G also has means for making the XY plane 31 and the workpiece installation surface 18 parallel to each other. Also in this case, the workpiece installation surface 18 is not set on the upper surface of the table 20, but a workpiece installation surface 18 which is parallel to the XY plane 31 is newly set. In addition , the 2nd machine tool 10B mentioned above, the 4th machine tool 10D, etc. can be employ | adopted as a means to make the XY plane 31 and the main axis | shaft 26 orthogonal positional relationship.

  And the 7th machine tool 10G is installed in the upper surface of the table 20, the natural clamp jig | tool 120 holding the some natural rod (for example, 1st natural rod 122A-3rd natural rod 122C) so that advancement / retraction was possible, and the main axis | shaft 26 And a reference tool 124 used for positioning a plurality of natural rods.

  The natural clamp jig 120 includes a base 126 and a first natural rod 122A to a third natural rod 122C attached to the base 126 so as to be able to advance and retreat. The first natural rod 122A to the third natural rod 122C are installed at arbitrary positions on the base 126 so that one flat surface (work setting surface 18) is formed at each tip.

  The natural clamp jig 120 may be a general one and can employ the following configuration.

  That is, the first natural rod 122A to the third natural rod 122C are supported by the spring that always biases upward. As the reference tool 124 is lowered, each protrusion amount is positioned at a preset protrusion amount, and the first natural rod 122A to the third natural rod 122C are clamped by hydraulic pressure due to the pressure increase accompanying the positioning. Let

  Alternatively, the first natural rod 122A to the third natural rod 122C are positioned in the base 126 in the initial state. When the reference tool 124 reaches a height corresponding to each protrusion amount, the first natural rod 122A to the third natural rod 122C are moved upward by a piston or the like, and each protrusion amount is set in advance. The first natural rod 122A to the third natural rod 122C are clamped by hydraulic pressure due to the pressure increase accompanying the positioning when the protrusion amount is reached.

  The first natural rod 122A to the third natural rod 122C are configured such that the workpiece installation surface 18 and the main shaft 26 are orthogonal to each other using the inclination angle αy of the main shaft 26 in the Y direction and the inclination angle αx in the X direction. Determine the amount of protrusion and position. As a result, the workpiece installation surface 18 and the main shaft 26 are in a state of being orthogonal to each other.

  That is, also in the seventh machine tool 10G, when the XY plane 31 and the workpiece installation surface 18 are parallel to each other and the plane machining is performed on the workpiece 16 based on the XY plane 31 after the coordinate rotation, The flatness of the processed surface can be improved. And since the side surface shape of the workpiece | work 16 can be processed into a rectangular shape, the processing surface of the workpiece | work 16 and the workpiece | work installation surface 18 become parallel, and processing quality can be improved.

  In addition, the machine tool and the workpiece plane machining method according to the present invention are not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

10A to 10G ... 1st machine tool to 7th machine tool 16 ... Work 18 ... Work installation surface 20 ... Table 26 ... Spindle 28 ... Milling tool 30 ... Work plane machining control unit 31 ... XY plane 32 ... Tip 32a ... Specific tip ( First specific chip) 32b ... Second specific chip 34 ... Cutting edge position measurement unit 36 ... Contact position storage unit 38 ... Cutting edge position storage unit 40 ... Spindle tilt angle calculation unit 42 ... Coordinate rotation unit 44 ... Spindle displacement measurement unit 46 ... Tool length measuring device 100 ... Touch probe 101 ... Measuring element position measuring unit 102 ... Measuring element position storage unit 104 ... Sensor unit 106 ... Measuring element 106a ... First measuring element 106b ... Second measuring element 108 ... Shank 110a ... First rotation Shaft 110b ... second rotating shaft 112 ... biaxial table 114 ... support portion 120 ... natural clamp jigs 122A to 122C ... first natura Rod to third Natural rod 124 ... reference tool .alpha.x ... inclination angle .alpha.y ... inclination angle M1 to M4 ... first measured value to the fourth measurement value with respect to the Y direction about the X-direction

Claims (15)

A table having a workpiece installation surface to which the workpiece is fixed; and a spindle to which a tool for plane machining the workpiece fixed to the table along one direction (X direction) in the XY plane of plane machining is attached; A machine tool having a workpiece plane machining control unit that performs machining so that a projected area of the tool partially overlaps the plane of the workpiece when machining the workpiece using the tool,
Of the main shaft, at least one contact disposed at a position facing the table;
Contact position for storing a plurality of measurement values obtained by positioning the contact at the same point with at least one phase of the spindle and measuring the position of the contact at least twice A storage unit;
Based on the contact position storage plurality of said measured values stored in the unit, and the spindle inclination angle calculating unit that calculates an inclination angle of the main shaft with respect to the XY plane of flattening,
Based on the inclination angle of the main axis calculated by the main axis inclination angle calculation unit, the XY plane is rotated around at least one of the X axis and the Y axis, and the XY plane is rotated . A coordinate rotation unit that makes at least the other direction (Y direction) and the main axis orthogonal to each other ;
The work plane machining control unit is configured to machine a plane of the workpiece on the XY plane rotated by the coordinate rotation unit. The machine tool according to claim 1,
The contactor position storage unit stores a plurality of measured values obtained by positioning one contactor at the same point at two or more different phases of the main shaft. The machine tool according to claim 1,
A plurality of the contacts are installed on the main shaft,
The contactor position storage unit is obtained by performing a process of measuring each position of the plurality of contactors after positioning the plurality of contactors at the same point with one phase of the main shaft. Memorize multiple measurements,
The spindle inclination angle calculation unit obtains an inclination angle of the spindle with respect to at least another direction of the XY plane based on the plurality of measurement values. The machine tool according to any one of claims 1 to 3,
The contact is a tip installed at a position facing the table among the tools,
The contactor position storage unit is obtained by performing the process of measuring the position of the cutting edge at least twice after positioning the cutting edge of the chip using the cutting edge position measuring means fixed to the table. A machine tool that stores a plurality of measured values. The machine tool according to claim 4,
A tool length measuring device for measuring the length of the tool is used as the cutting edge position measuring means. The machine tool according to any one of claims 1 to 3,
The contact is a probe of a touch probe installed at a position facing the table in the main shaft,
The machine tool is characterized in that the measuring element is displaced in the X direction or the Y direction of the table from the central axis of the main shaft. The machine tool according to any one of claims 1 to 6,
A machine tool, further comprising: a rotation axis that rotates the workpiece setting surface so that the XY plane rotated by the coordinate rotating unit and the workpiece setting surface are parallel to each other. The machine tool according to any one of claims 1 to 6,
A machine tool, further comprising a natural clamp jig for positioning the workpiece installation surface so that the XY plane rotated by the coordinate rotation unit and the workpiece installation surface are parallel to each other. The machine tool according to any one of claims 1 to 8,
The machine tool according to claim 1, wherein a diameter of the tool is smaller than a short dimension of the workpiece. A table having a workpiece setting surface to which the workpiece is fixed; and a spindle to which a tool for plane machining the workpiece placed on the table along one direction (X direction) in the XY plane of plane machining; When machining the workpiece using the tool, a workpiece plane machining method for machining so that a projected area of the tool partially overlaps the plane of the workpiece,
At least two processes of measuring the position of the contact after positioning at least one contact placed at a position facing the table among the spindles at the same point in at least one phase of the spindle. A measurement value storing step for storing a plurality of measurement values obtained by performing the measurement,
Based on the stored plurality of said measured values, and the spindle inclination angle calculation step of calculating an inclination angle of the main shaft with respect to the XY plane of flattening,
Based on the calculated inclination angle of the main axis, the XY plane is rotated around at least one of the X axis and the Y axis, and at least the other direction (Y direction) of the XY plane. And a coordinate rotation step for making the principal axis orthogonal to each other ,
A workpiece plane machining method, wherein a plane of the workpiece is machined on the XY plane rotated in the coordinate rotation step. In the work plane processing method according to claim 10,
In the measured value storing step, a plurality of measured values obtained by positioning one contactor at the same point at two or more different phases of the spindle are stored. In the work plane processing method according to claim 10,
A plurality of the contacts are installed on the main shaft,
The measurement value storage step includes a plurality of contact points obtained by performing a process of measuring each position of the plurality of contactors after positioning the plurality of contactors at the same point with one phase of the main shaft. Memorize the measured value of
The main spindle inclination angle calculating step calculates an inclination angle of the main spindle in at least another direction of the XY plane based on the plurality of measurement values. In the work plane processing method according to any one of claims 10 to 12,
The contact is a tip installed at a position facing the table among the tools,
The measurement value storing step is obtained by performing the process of measuring the position of the cutting edge at least twice after positioning the cutting edge of the chip using the cutting edge position measuring means fixed to the table. A workpiece plane machining method characterized by memorizing measured values. In the work plane processing method according to any one of claims 10 to 12,
The contact is a probe of a touch probe installed at a position facing the table in the main shaft,
The workpiece flattening method according to claim 1, wherein the measuring element is displaced in a X direction or a Y direction of the table from a central axis of the main axis. In the work plane processing method according to any one of claims 10 to 14,
The work plane processing method, wherein the diameter of the tool is smaller than the short dimension of the work.

Images